JP6471124B2 - Sliding switching valve and refrigeration cycle system - Google Patents

Description

  The present invention relates to a slide type switching valve and a refrigeration cycle system.

  Conventionally, as a refrigeration cycle used in an air conditioner such as a room air conditioner, the refrigerant is circulated to the compressor via the compressor, the outdoor heat exchanger, the expansion valve, and the indoor heat exchanger during the cooling mode (cooling) operation. It is used that reverses the direction of refrigerant circulation so that the refrigerant is circulated to the compressor via the compressor, indoor heat exchanger, expansion valve, and outdoor heat exchanger during heating mode (heating) operation. Has been. As a flow path switching valve (so-called four-way switching valve) for reversing the refrigerant circulation path in such a refrigeration cycle, a sliding switching valve having a valve member slidably provided inside the valve body is widely used. ing.

  As such a slide type switching valve (for example, a four-way switching valve), a slide valve in which a space in a valve housing (valve body) is partitioned by a pair of pistons has been proposed (for example, see Patent Document 1). In the slide valve described in Patent Document 1, pistons are connected to both ends of a connecting plate (connecting member) that holds a valve body (valve member), and these slide together.

JP 2004-125238 A

  In the slide valve described in Patent Document 1, since an insertion member such as a screw is inserted into the bottom of the piston and connected to the connecting plate, a high sealing performance is required at this insertion location. Moreover, when using other insertion members, such as a rivet, high sealing performance is required similarly. In addition, since the valve element disposed between the pair of pistons is in sliding contact with the valve seat formed so as to protrude inward from the inner peripheral surface of the valve housing, the pair of pistons and the connecting member are connected in advance. After that, it cannot be accommodated in the valve housing. Therefore, since at least one of the pair of pistons is connected to the connecting member housed in the valve housing, the connection work is difficult and the assemblability is low.

  The objective of this invention is providing the refrigerating cycle system provided with the slide type switching valve which can improve the sealing performance of a piston body, and the assembly property of a piston body and a connection member, and this sliding type switching valve. is there.

  In the slide type switching valve of the present invention, a joint member is inserted into and connected to the opening formed in the side surface of the cylindrical valve body, and one or more other side of the side surface on the opposite side of the opening. The valve body is provided with a valve seat in which an opening is formed, and a valve member that slides so as to cover a part or all of the other opening is accommodated in the valve body. A pair of piston bodies that are accommodated in the chamber and divide the valve body into three spaces in the axial direction; and a coupling member that couples the pair of piston bodies and moves the valve member. Has a bottomed cylindrical sliding contact member that is in sliding contact with the inner peripheral surface of the valve main body, and an inner plate that is superimposed on the inside of the bottom of the sliding contact member, and the connecting member is arranged in the axial direction. Provided at both ends and along the inner plate The inner plate has a main body portion and a locking piece raised from the main body portion and extending along the main body portion, and the locked piece is Further, it is characterized in that it is inserted between the main body portion and the locking piece along the rotation direction around the rotation axis along the axial direction and can be locked by the locking piece.

  According to such this invention, a piston body and a connection member can be connected because the to-be-latched piece of a connection member is locked by the lock piece of a piston body. At this time, as a member for connecting the piston body and the connecting member, there is no need to use a member that penetrates the bottom of the sliding contact member in the piston body, and the sealing performance can be improved. In addition, the locked piece is inserted between the main body portion and the locking piece along the rotation direction centering on the rotation axis along the axial direction of the valve body, so that the piston is centered on the rotation axis. By locking the body and the connecting member relative to each other, the locked piece can be locked to the locking piece. Therefore, in a state where the connecting member is accommodated in the valve body, the piston body and the connecting member can be connected by relative rotation, and assemblability can be improved.

  At this time, in the slide type switching valve of the present invention, one of the locked piece and the locking piece is formed with an engaging projection toward the other, and the other is engaged with the engaging projection. It is preferable that an engaging recess or an engaging hole is formed. According to such a configuration, by engaging the engagement protrusion with the engagement recess or the engagement hole, it is possible to suppress unintentional release of the locked piece by the locking piece. Can do.

  Moreover, in the slide type switching valve of the present invention, the connecting member has a plurality of the locked pieces arranged so as to have a rotational symmetry of two or more times around the rotation shaft, and the inner plate Preferably has a plurality of locking pieces arranged so as to have the same number of rotational symmetry as the arrangement of the plurality of locked pieces in the connecting member. According to such a configuration, the plurality of locked pieces and the locking pieces are arranged with rotational symmetry, so that the plurality of locked pieces are moved by relative rotation between the piston body and the connecting member. Each of the plurality of locking pieces can be locked simultaneously. In addition, when the number of pieces to be locked and the number of pieces to be locked are not the same, and there is a piece that does not correspond to the counterpart (not locked or locked), the one that does not correspond to the counterpart is “locked” in the present invention. It shall not fall under “piece” or “locking piece”.

  The refrigeration cycle system of the present invention includes a compressor that compresses a refrigerant that is a fluid, a first heat exchanger that functions as a condenser in the cooling mode, a second heat exchanger that functions as an evaporator in the cooling mode, An expansion means for expanding and reducing the pressure of the refrigerant between the first heat exchanger and the second heat exchanger, and the sliding switching valve according to any one of the above, are provided. According to the present invention as described above, the sealing performance of the piston body can be improved as described above, the leakage of the refrigerant can be suppressed, and the reduction in the operation efficiency of the refrigeration cycle system can be suppressed.

  According to the slide type switching valve and the refrigeration cycle system of the present invention, the piston body and the connecting member are connected by engaging the locked piece of the piston body with the engaging piece of the connecting member, so that the piston body It is possible to improve the sealing performance.

It is a schematic block diagram of the refrigerating cycle provided with the slide type switching valve which concerns on one Embodiment of this invention. It is sectional drawing which shows the said slide type switching valve. It is a perspective view which shows the piston body and connection member of the said slide type switching valve. It is a perspective view which shows a mode that the said piston body and the said connection member are connected. It is sectional drawing which shows a mode that the said piston body and the said connection member are connected. It is sectional drawing along the AA line of FIG. It is sectional drawing which shows a mode that the said piston body and one said connection member were accommodated in the valve main body of the said slide type switching valve. It is sectional drawing which shows a mode that the other said piston body is connected to the said connection member accommodated in the said valve main body. It is sectional drawing which shows the piston body and connection member of the slide type switching valve which concern on a modification. It is sectional drawing which shows the piston body and connection member of the slide type switching valve which concern on another modification.

  Hereinafter, each embodiment of the present invention will be described with reference to the drawings. As shown in FIG. 1, a four-way switching valve (sliding switching valve) 10 according to the present embodiment is provided in a refrigeration cycle 1, for example. The refrigeration cycle 1 is used for an air conditioner such as a room air conditioner, and compresses a refrigerant as a fluid, and outdoor heat as a first heat exchanger that functions as a condenser in a cooling mode. The refrigerant is expanded and decompressed between the exchanger 3, the indoor heat exchanger 4 as a second heat exchanger that functions as an evaporator in the cooling mode, and the outdoor heat exchanger 3 and the indoor heat exchanger 4. An expansion valve 5 as an expansion means, a four-way switching valve 10, and a pilot electromagnetic valve 6 for switching and controlling the flow path of the four-way switching valve 10 are provided, and these are connected by a refrigerant pipe. The expansion means is not limited to the expansion valve 5 and may be a capillary.

  This refrigeration cycle 1 includes a compressor 2, a four-way switching valve 10, an outdoor heat exchanger 3, an expansion valve 5, an indoor heat exchanger 4, a four-way switching valve 10 and a compressor in the cooling mode (cooling operation) shown in FIG. A cooling cycle in which the refrigerant flows in the order of 2 is configured. On the other hand, in the heating mode (heating operation), heating in which refrigerant flows in the order of the compressor 2, the four-way switching valve 10, the indoor heat exchanger 4, the expansion valve 5, the outdoor heat exchanger 3, the four-way switching valve 10, and the compressor 2. Configure the cycle. Switching between the heating cycle and the cooling cycle is performed by a switching operation of the four-way switching valve 10 by the pilot solenoid valve 6.

  As shown in FIG. 2, the four-way switching valve 10 according to the embodiment of the present invention includes a cylindrical valve body 11, a valve body 12 slidably provided inside the valve body 11, and the compressor 2. A high pressure side conduit (D joint) 13 as a joint member communicating with the discharge port of the compressor, a low pressure side conduit (S joint) 14 communicating with the suction port of the compressor 2, and an indoor side conduit communicating with the indoor heat exchanger 4 (E joint) 15 and an outdoor conduit (C joint) 16 communicating with the outdoor heat exchanger 3 are provided. In the present embodiment, the axial direction of the valve body 11 is the X direction, the extending direction of the joints 13 to 16 is the Z direction, and the direction substantially orthogonal to the X direction and the Z direction is the Y direction.

  The cylindrical valve body 11 includes plug bodies 17 and 18 that close both ends in the X direction, and a valve seat 19 that is fixed inside the valve body 11, and is configured as a sealed cylinder. . Connected to the plug bodies 17 and 18 are conduits 17A and 18A communicating with the pilot solenoid valve 6, respectively. The valve seat 19 is inserted with respective distal ends of the low pressure side conduit 14, the indoor side conduit 15, and the outdoor side conduit 16, and the openings constituting the first port 11C, the second port 11D, and the outflow port 11B described later. Is provided. The upper surface 19 </ b> A of the valve seat 19 is a guide surface (valve seat surface) for slidingly guiding the valve body 12, and is located on the inner side of the valve body 11 with respect to the inner peripheral surface 110 of the valve body 11.

  The valve body 11 is formed with a plurality of ports 11A, 11B, 11C, and 11D opened in the side surface portion 111 thereof. That is, an inflow port 11A serving as an opening through which the high pressure side conduit 13 is connected to allow the refrigerant to flow into the valve body 11, and the valve on the opposite side of the side surface 111 of the valve body 11 with respect to the inflow port 11A in the radial direction. A first port 11 </ b> C, a second port 11 </ b> D, and an outflow port 11 </ b> B are provided as other openings that open to the seat 19. The outflow port 11B is provided substantially in the center of the valve body 11 in the X direction, and the first port 11C is provided adjacent to one side (left side in FIG. 2) of the outflow port 11B along the X direction of the valve body 11. The second port 11D is provided on the other side (the right side in FIG. 2) of the outflow port 11B along the X direction.

  The low pressure side conduit 14 is connected to the outflow port 11B, and the indoor side conduit 15 is connected to the first port 11C, so that the first port 11C constitutes the indoor side port and the second port 11D is the outdoor side. When the conduit 16 is connected, the second port 11D constitutes an outdoor port. The low pressure side conduit 14, the indoor side conduit 15 and the outdoor side conduit 16 are brazed and fixed to the valve body 11 and the valve seat 19 around the outflow port 11B, the first and second ports 11C and 11D, respectively.

  The valve body 12 includes a pair of left and right piston bodies 21 and 22 that are in sliding contact with the inner peripheral surface 110 of the valve body 11, a connection member 23 that connects the pair of piston bodies 21 and 22 and extends along the X direction, and a connection member. 23, and a valve member 24 supported by 23. The internal space of the valve body 11 includes a high pressure chamber R1 formed between the pair of piston bodies 21 and 22, a first working chamber R2 formed between one piston body 21 and the plug body 17, and the other The second working chamber R3 formed between the piston body 22 and the plug body 18 is partitioned. That is, the pair of piston bodies 21 and 22 accommodated in the valve body 11 divides the space in the valve body 11 into three spaces in the X direction.

  As shown in FIGS. 3 and 6, the piston body 21 includes a packing 211 as a bottomed cylindrical sliding contact member that is in sliding contact with the inner peripheral surface 110 of the valve body 11, and a cylindrical portion of the packing 211 as an inner peripheral surface. A bottomed cylindrical spring member 212 that presses against 110, an inner reinforcing plate 213 as an inner plate that sandwiches the bottom portion 211A of the packing 211 and the bottom portion of the spring member 212 from the X direction, and an outer reinforcing plate 214 as an outer plate. Have. The packing 211, the spring member 212, the inner reinforcing plate 213, and the outer reinforcing plate 214 are integrally fixed by a rivet 215 that passes through them in the direction perpendicular to the surface. Although the rivet 215 passes through the bottom 211A of the packing 211, the through hole is sealed with a sufficient sealing property because it is crushed by pressing or the like with sufficient pressure. . The piston body 22 has the same configuration as the piston body 21, that is, includes a packing 221, a spring member 222, an inner reinforcing plate 223, an outer reinforcing plate 224, and a rivet 225.

  The inner reinforcing plate 213 includes a plate-shaped main body 213A and two locking pieces 213B raised from the main body 213A. The locking piece 213B is formed by bending such as cutting and raising, and is raised from the main body part 213A to the inner side (on the side opposite to the packing 211, that is, the connection part side to the connecting member 23), and the tip thereof is the main body part. It is bent so as to extend substantially parallel to 213A. A locking groove 210 is formed between the main body portion 213A and the locking piece 213B, and the width of the locking groove 210 (the interval between the main body portion 213A and the locking piece 213B in the X direction) is described later of the connecting member 23. The dimension is about the same as or slightly smaller than the thickness of the locked piece 231 to be engaged.

  The two locking pieces 213B are arranged so as to have two-fold rotational symmetry about the rotation axis O along the X direction and passing through the approximate center of the piston body 21. The two-fold rotational symmetry is 180 ° symmetry, and is arranged so that one of the two locking pieces 213B overlaps the other when rotated 180 °. Further, an engaging recess 213C is formed in a portion (outer surface) of the locking piece 213B that overlaps the locked piece 231 described later.

  The connecting member 23 is formed in a plate shape by a metal member, extends along the X direction of the valve body 11, is provided in parallel with the upper surface 19 </ b> A of the valve seat 19, and one end of the connecting plate portion 23 </ b> A. 2 engaged pieces 231 bent to the opposite sides so as to be along the ZY plane, and two engaged pieces bent to the opposite sides so that the other end of the connecting plate portion 23A is along the ZY plane And a stop piece 232. The connecting plate portion 23A is formed with a holding hole 23D for holding the valve member 24 and two through holes 23E through which the refrigerant flows.

  As shown in FIG. 6, the locked piece 231 is inserted into the locking groove 210 and locked to the locking piece 213B. Further, an engagement protrusion 231A is formed on an inner surface (a surface opposite to the packing 211, that is, a surface on the engagement piece 213B side), and the engagement piece 231 is engaged with the engagement piece 213B. When this is done, the engaging protrusion 231A engages with the engaging recess 213C. The two locked pieces 231 are arranged so as to have two-fold rotational symmetry about the rotation axis O. The locked piece 232 has the same shape as the locked piece 231.

  The valve member 24 is an integrally molded member made of a synthetic resin, and as shown in FIG. 2, a flange portion 25 that opens concavely toward the valve seat 19 and an opening edge of the flange portion 25 outward. And an extending flange portion 26. The flange 25 is formed in a dome shape having an oval shape in plan view, and is inserted into the holding hole 23 </ b> D of the connecting member 23. Inside the collar portion 25, the outflow port 11B and the first port 11C are communicated with each other and the second port 11D is not communicated, or the outflow port 11B and the second port 11D are communicated with each other to connect the first port 11C. A communication space R4 that does not allow communication is formed.

  The flange portion 26 includes a slidable contact surface 26 </ b> A that is in sliding contact with the upper surface 19 </ b> A of the valve seat 19, and an opening portion 25 </ b> A that opens to the slidable contact surface 26 </ b> A and communicates with the inside of the flange portion 25. The flange portion 26 is disposed between the valve seat 19 and the connecting member 23. The sliding contact surface 26A is brought into close contact with the upper surface 19A of the valve seat 19 due to the pressure difference between the high pressure and the low pressure acting on the valve member 24, and the communication space R4 of the flange 25 is closed with respect to the valve seat 19. Yes.

  In the above four-way switching valve 10, when the high-pressure refrigerant is introduced into the second working chamber R3 via the pilot solenoid valve 6 and the conduit 18A, as shown in FIGS. 12 is slid to one side of the valve body 11 in the X direction (left side in FIGS. 1 and 2) and moved to the first position. When the high-pressure refrigerant discharged from the compressor 2 is introduced into the first working chamber R2 via the pilot solenoid valve 6 and the conduit 17A, the piston body 21 is pressed and the valve body 12 is moved in the X direction of the valve body 11. It is slid to the other side (right side in FIGS. 1 and 2) and moved to the second position.

  In a state where the valve body 12 is in the second position, the flange portion 25 of the valve member 24 allows the outflow port 11B and the second port 11D to communicate with each other through the communication space R4. Further, since the flange portion 25 is located on the other side of the first port 11C, the first port 11C communicates with the inflow port 11A through the inside of the valve body 11 (high pressure chamber R1). That is, the state in which the valve body 12 is in the second position is a heating mode (heating operation) in which the inflow port 11A and the first port 11C are in communication and the outflow port 11B and the second port 11D are in communication.

  In this heating mode, the high-pressure refrigerant H discharged from the compressor 2 is introduced into the high-pressure chamber R1 via the high-pressure side conduit 13 and the inflow port 11A, and the high-pressure refrigerant H that has passed through the high-pressure chamber R1 is the first port 11C. And is supplied to the indoor heat exchanger 4 through the indoor conduit 15. Further, the low-pressure refrigerant L is introduced from the outdoor heat exchanger 3 into the communication space R4 of the flange portion 25 through the outdoor conduit 16 and the second port 11D, and the low-pressure refrigerant L that has passed through the communication space R4 is discharged into the outflow port 11B and The refrigerant is refluxed to the compressor 2 through the low-pressure side conduit 14.

  On the other hand, when the valve body 12 is in the first position, the flange 25 of the valve member 24 allows the outflow port 11B and the first port 11C to communicate with each other through the communication space R4. Further, since the flange portion 25 is located on one side of the second port 11D, the second port 11D is communicated with the inflow port 11A via the inside of the valve body 11 (high pressure chamber R1). That is, the state in which the valve body 12 is in the first position is a cooling mode (cooling operation) in which the inflow port 11A and the second port 11D are in communication and the outflow port 11B and the first port 11C are in communication.

  Here, a method of connecting the piston body 21 and the connecting member 23 will be described. The connecting method between the piston body 22 and the connecting member 23 is the same. First, as shown in FIGS. 4A and 5A, the locked piece 231 is brought into contact with the main body 213 </ b> A of the inner reinforcing plate 213. Next, the piston body 21 and the connecting member 23 are rotated relative to each other about the rotation axis O (in the illustrated example, the piston body 21 is rotated clockwise with respect to the connecting member 23), and FIG. As shown in FIG. 5B, two locked pieces 231 are inserted into the two locking grooves 210, respectively, and locked to the locking pieces 213B. At this time, the engagement protrusion 231A is relatively rotated until the engagement protrusion 231A is positioned in the engagement recess 213C and engaged. The piston body 21 and the connecting member 23 can be connected to the outside of the valve body 11. In this case, the piston body 21 and the connecting member 23 pass through the substantial center of the bottom surface of the piston body 21 (the bottom portion 211A of the packing 211) and are substantially on the bottom surface. What is necessary is just to relatively rotate the piston body 21 and the connecting member 23 around the rotation axis along the vertical direction.

  FIG. 6 also shows a state where the locked piece 231 is locked in the locking groove 210. In this way, the two locked pieces 231 are inserted into the two locking grooves 210 and locked by the locking pieces 213B, whereby the piston body 21 and the connecting member 23 are connected.

  A procedure for accommodating the piston bodies 21 and 22, the connecting member 23, and the valve member 24 in the valve main body 11 will be described. First, while connecting one piston body 21 and the connection member 23 as described above, the valve member 24 is positioned in the holding hole 23D of the connection member 23, and as shown in FIG. The piston body 21, the connecting member 23, and the valve member 24 are accommodated in the valve main body 11 to which 18 is not attached.

  Next, the other piston body 22 is accommodated in the valve body 11, and the piston body 22 is rotated about the rotation axis O, whereby the piston body 22 is connected to the connecting member 23 as shown in FIG. 8. At this time, it is preferable that the piston body 21, the connecting member 23, and the valve member 24 are slid in advance to the opening side (right side in FIG. 8) where the piston body 22 is provided.

  When the piston body 21 and the connecting member 23 cannot be accommodated in the valve main body 11 in a connected state, the pair of piston bodies 21 are accommodated after the connecting member 23 and the valve member 24 are accommodated in the valve main body 11. , 22 may be connected to the connecting member 23, respectively.

  According to this embodiment, there are the following effects. In other words, the latched piece 231 of the coupling member 23 is latched by the latching piece 213B of the piston body 21, whereby the piston body 21 and the coupling member 23 can be connected. Similarly, the piston body 22 and the coupling member are connected. 23 can be connected. At this time, it is not necessary to use a member that penetrates the bottoms of the packings 211 and 221 in the piston bodies 21 and 22, and the sealing performance can be improved. Further, the locked piece 231 is inserted between the main body portion 213A and the locking piece 213B along the rotation direction around the rotation axis O along the axial direction (X direction) of the valve main body 11. Thus, in a state where the coupling member 23 is accommodated in the valve body 11, the piston bodies 21 and 22 and the coupling member 23 can be connected to each other by relative rotation, and assemblability can be improved.

  Further, by engaging the engaging protrusion 231A formed on the locked piece 231 with the engaging recess 213C formed on the locking piece 213B, the locked piece 231 is intended to be locked by the locking piece 213B. It is possible to suppress the release without performing.

  Further, each of the two pieces to be locked 231 and the locking piece 213B is arranged with two-fold rotational symmetry about the rotation axis O, so that the relative rotation between the piston body 21 and the connecting member 23 is achieved. Thus, the two locked pieces 231 can be simultaneously locked to the two locking pieces 213B.

  In addition, this invention is not limited to the said embodiment, Including other structures etc. which can achieve the objective of this invention, the deformation | transformation etc. which are shown below are also contained in this invention.

  For example, in the above-described embodiment, the engaging recess 213C is formed on the locking piece 213B of the inner reinforcing plate 213 of the piston body 21, and the engaging protrusion 231A is formed on the locked piece 231 of the connecting member 23. However, as shown in FIG. 9, an engagement hole 213D penetrating the locking piece 213B may be formed, and the engagement protrusion 231A may be engaged with the engagement hole 213D.

  Moreover, it is good also as a structure by which an engagement recessed part or an engagement hole is formed in a to-be-latched piece while an engaging protrusion is formed in a locking piece. For example, as shown in FIG. 10, the engaging piece 213 </ b> B is formed with an engaging protrusion 213 </ b> E toward the outside (the locked piece 231 side) and an engaging hole 231 </ b> B penetrating the locked piece 231. The engagement protrusion 213E may be engaged with the engagement hole 231B.

  Moreover, in the said embodiment, although the inner side reinforcement board 213 shall have the two locking pieces 213B, the number of the locking pieces may be one and three or more may be formed. At this time, the connection member should just have the number of to-be-latched pieces according to the latching piece. Further, the plurality of locking pieces and the locking pieces may have the same number of rotational symmetry or may not have rotational symmetry. In that case, the piston body and the connecting member It is only necessary that each piece to be locked is locked by each locking piece by the relative rotation.

  Moreover, in the said embodiment, although the connection member 23 shall be plate shape, the connection member may be formed of the rod-shaped member. In addition, the locking piece provided on the connecting member only needs to extend along the inner reinforcing plate, and is not limited to one formed by bending. The locking piece may be connected by welding or the like. In addition, the locking piece provided on the inner reinforcing plate is not limited to the one formed by being cut and raised as long as it extends along the main body, and for example, a separate engagement with the main body. The stop piece may be connected by welding or the like.

  In the above embodiment, the bottom portion 211A of the packing 211 is sandwiched from the X direction by the inner reinforcing plate 213 as the inner plate and the outer reinforcing plate 214 as the outer plate. When the strength is sufficiently ensured, the outer reinforcing plate may not be provided.

  In addition, the best configuration, method and the like for carrying out the present invention have been disclosed in the above description, but the present invention is not limited to this. That is, the invention has been illustrated and described primarily with respect to particular embodiments, but may be configured for the above-described embodiments without departing from the scope and spirit of the invention. Various modifications can be made by those skilled in the art in terms of materials, quantity, and other detailed configurations. Therefore, the description limiting the shape, material, etc. disclosed above is an example for easy understanding of the present invention, and does not limit the present invention. The description by the name of the member which remove | excluded the limitation of one part or all of such is included in this invention.

1 Refrigeration cycle 2 Compressor 3 Outdoor heat exchanger (first heat exchanger)
4 Indoor heat exchanger (second heat exchanger)
5 Expansion valve (expansion means)
10 Four-way switching valve (sliding switching valve)
11 Valve body 110 Inner peripheral surface 11A Inflow port (opening)
11B to 11D ports (other openings)
13 High-pressure side conduit (joint member)
19A Top surface (valve seat surface)
21, 22 Piston body 211, 221 Packing (sliding contact member)
211A Bottom portion 213, 223 Inner reinforcing plate (inner plate)
213A Main body 213B Locking piece 213C Engaging recess 213D Engaging hole 213E Engaging projection 214, 224 Outer reinforcing plate (outer plate)
23 connecting members 231 and 232 locked piece 231A engaging protrusion 231B engaging hole 24 valve member

Claims (4)

A valve seat in which a joint member is inserted and connected to an opening formed in the side surface of the tubular valve body, and one or more other openings are formed on the side of the side surface opposite to the opening. A slide type switching valve that is provided and a valve member that slides so as to cover a part or all of the other opening is housed in the valve body,
A pair of piston bodies housed in the valve body and partitioning the valve body into three spaces in the axial direction;
A connecting member that connects the pair of piston bodies and moves the valve member;
The piston body includes a bottomed cylindrical sliding contact member that is in sliding contact with the inner peripheral surface of the valve body, and an inner plate that is superimposed on the inside of the bottom of the sliding contact member,
The connecting member has a locked piece provided at both ends in the axial direction and extending along the inner plate,
The inner plate has a main body part, and a locking piece raised from the main body part and extending along the main body part,
The locked piece is inserted between the main body portion and the locking piece along a rotation direction around a rotation axis along the axial direction and can be locked by the locking piece. A slide-type switching valve characterized by   One of the locked piece and the locking piece is formed with an engagement protrusion toward the other, and the other is formed with an engagement recess or an engagement hole with which the engagement protrusion is engaged. The sliding type switching valve according to claim 1, wherein: The connecting member has a plurality of the locked pieces arranged so as to have two or more rotational symmetry about the rotation axis,
The said inner side board has a plurality of said locking pieces arrange | positioned so that it may have the rotational symmetry of the same number of times as arrangement | positioning of the said several to-be-latched pieces in the said connection member. The sliding type switching valve according to 1.   A compressor that compresses a refrigerant that is a fluid, a first heat exchanger that functions as a condenser in the cooling mode, a second heat exchanger that functions as an evaporator in the cooling mode, the first heat exchanger, and the first A refrigeration cycle system comprising: expansion means for expanding and reducing the pressure of a refrigerant between two heat exchangers; and the slide type switching valve according to any one of claims 1 to 3. .

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